Functional redundancy dampens precipitation change impacts on species‐rich invertebrate communities across the Neotropics
2022
Céréghino, Régis | Trzcinski, Mark Kurtis | Macdonald, A. Andrew M. | Marino, Nicholas, A. C. | Acosta Mercado, Dimaris | Leroy, Celine | Corbara, Bruno | Romero, Gustavo | Farjalla, Vinicius F. | Barberis, Ignacio M. | Dézerald, Olivier | Hammill, Edd | Atwood, Trisha B. | Piccoli, Gustavo, C. E. | Ospina Bautista, Fabiola | Carrias, Jean-Francois | Leal, Juliana S. | Montero, Guillermo | Antiqueira, Pablo, A. P. | Freire, Rodrigo | Realpe, Emilio | Amundrud, Sarah L. | Omena, Paula M. De | Campos, Alice, B. A. | Srivastava, Diane S. | Laboratoire Ecologie Fonctionnelle et Environnement (LEFE) ; Institut Ecologie et Environnement - CNRS Ecologie et Environnement (INEE-CNRS) ; Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3) ; Communauté d'universités et établissements de Toulouse (Comue de Toulouse)-Communauté d'universités et établissements de Toulouse (Comue de Toulouse)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP) ; Communauté d'universités et établissements de Toulouse (Comue de Toulouse) | University of British Columbia [Canada] (UBC) | Centre de Synthèse et d’Analyse sur la Biodiversité (CESAB) ; Fondation pour la recherche sur la Biodiversité (FRB) | Centre de la Science et de la Biodiversité du Québec - Quebec Center for Biodiversity Science (CSBQ - QCBS) | Universidade Federal do Rio de Janeiro [Brasil] = Federal University of Rio de Janeiro [Brazil] = Université fédérale de Rio de Janeiro [Brésil] (UFRJ) | University of Puerto Rico (UPR) | Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [Occitanie])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université de Montpellier (UM) | Ecologie des forêts de Guyane (UMR ECOFOG) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-AgroParisTech-Université de Guyane (UG)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | Laboratoire Microorganismes : Génome et Environnement (LMGE) ; Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA) | Universidade Estadual de Campinas = University of Campinas (UNICAMP) | Universidad Nacional de Rosario [Santa Fe] | Dynamique et durabilité des écosystèmes : de la source à l’océan (DECOD) ; Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut Agro Rennes Angers ; Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro) | Utah State University (USU) | Universidade Estadual Paulista Júlio de Mesquita Filho = São Paulo State University (UNESP) | Universidad de Caldas [Manizales, Colombia] | Universidade Federal do Estado do Rio de Janeiro (UNIRIO) | Universidade Federal Rural do Rio de Janeiro (UFRRJ) | ANR-10-LABX-0025,CEBA,CEnter of the study of Biodiversity in Amazonia(2010) | ANR-12-BSV7-0022,RAINWEBS,Que se passera-t-il si les forêts tropicales s'assèchent ? Changement climatique et réseaux trophiques le long d'un gradient latitudinal(2012)
International audience
显示更多 [+] 显示较少 [-]英语. Animal community responses to extreme climate events can be predicted from the functional traits represented within communities. However, it is unclear whether geographic variation in the response of functional community structure to climate change is primarily driven by physiological matching to local conditions (local adaptation hypothesis) or by differences between species pools in functional redundancy (insurance hypothesis). We conducted a coordinated experiment to understand how aquatic invertebrate traits mediate the responses of multitrophic communities to changes in the quantity and evenness of rainfall in 180 natural freshwater microcosms (tank bromeliads) distributed across six sites from 18°N in the Caribbean to 29°S in South America. At each site, we manipulated the mean and dispersion of the daily amount of rainfall that entered tank bromeliads over a 2-month period. Manipulations covered a response surface representing 50% to 200% of the dispersion of daily rainfall crossed with 10% to 300% of the mean amounts of rainfall. The response of functional community structure to precipitation regimes differed across sites. These geographic differences were not consistent with the local adaptation hypothesis, as responses did not correlate with the current amplitude in precipitation. Geographic differences in community responses were consistent with the insurance hypothesis: sites with the lowest functional redundancy in their species pools had the strongest response to a gradient in hydrological variability induced by uneven precipitation. In such sites, an increase in the hydrologic variability induced a shift from communities with both pelagic and benthic traits using both green and brown energy channels to strictly benthic, brown energy communities. Our results predict uneven impacts of precipitation change on community structure and energy channels within communities across Neotropical regions. This geographic variation is due more to differences in the size and redundancy of species pools than to local adaptation. Strategies for climate change adaptation should thus seek to identify and preserve functionally unique species and their habitats. Read the free Plain Language Summary for this article on the Journal blog.
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